Aerodynamic instability early warning method for air inlet channel of hypersonic aero-engine

The invention discloses a hypersonic aero-engine air inlet aerodynamic instability early warning method, which comprises the following steps of: normalizing preprocessed on-way wall surface pressure data characteristics, performing binary classification of starting and non-starting state data based on a linear SVM (Support Vector Machine) algorithm, and determining an optimal classification surface as a non-starting boundary of the current state of an air inlet; the method comprises the following steps of: determining a non-starting early-warning boundary of the non-starting boundary, judging the instability of the air inlet by using the non-starting boundary, training and evaluating back pressure multiple attributes of on-way wall surface pressure data on the basis of a BP neural network, taking the on-way wall surface pressure of the non-starting boundary and the early-warning boundary as regression input, and determining the instability of the air inlet by using the non-starting boundary. The back pressure